Isaac t



To allfwhomfitimayiconcem: i

Be it known that I, Isaac Y. GHUBBCK,

` of Roxbury, in the county of `Norfolk and State of Massachusetts, have invented a new and useful Improvement in Fan-Governors for Steam-Engines and other Motors; and Il do hereby declare that the following is a full, clear, and exact description of thesame, reference being had to the accompanying drawing, forming part of thisspecication, in which- Figure l, is a front view of a governor with my improvements. Fig.` 2, is a side View of the same partly in section. Fig. 3,

is a back view of the spring box or weight pulley.

Similar letters of reference indicate corresponding parts in the several iigures.

My invention consists in a novel mode of combining the spindle of a fan governor with the stem of the regulating valve wheref by the governor and valve are brought toi e gether in a very compact form without arranging the governor upon the valve spindle and thereby tending to draw the said spindle out of truth and so interfering with the proper operation of the valve. e e

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation. v

A, is the valve box and B, the valve stem. I have not represented the valve as it may be of any of the kinds commonly employed as regulators, but I generally use one of the kind commonly known as the register valve. `On the top of the valve box there is provided a stationary bearing L, for the main spindle C, of the governor which is arranged parallel with the valve stem. This spindle has fast upon it near its rear end a driving pulley G, and near its front end a spur gear b, and is fitted with a loose sleeve D, close behind the said gear b. Thissleeve in which the spindle C, is capable of turning freely, is furnished with a crank like arm E, in which is secured a stud a, upon which the `hub F, of the fan is :fitted to rotate freely.

The said arm E, has a toothed arc i formed upon or attached to its lower extremity and the teeth of this arc gear with a toothed sector I-I, on the valve stem B. The sleeve is represented in the drawing provided withla fast pulley I, from which to suspend a weight by a cord or chain in such a manner that the said weight would exert a tendency FANGOvERNOa 1101i smentire y 26,414, dated D 6.in Fig.n 1 in1 `which driven and by means y by the actionof the e arm upon the sector II.` `Instead of" the weigh however, I have representeda coiled.,` spring J, see Figs. 2, and 3,applied to produce` the same effect upon the sleeve said spring being 5 arranged within a stationary box K., secured l to the bearing L, andhaving one end` fast to the said box and thel other end fast to the sleeve. As the movement produced by this e spring or weight need not be very consider#` able stops c, c, are provided-onthe sleeveor y pulley on opposite sides of ailixed stopfd, on .i the box K, the stops c', `preventing thevalvei` being moved beyond the position in which it is wide open and the stop 0, preventing it moving beyond the position in which itis closed. The hub F, ofthefan has secured# to it a spur gear f, `gearingwith the gear 79, of the main spindle.` l e V e By the revolution ofthe main spindlelC,` of the governor in the direction of thearrow e, `derived from thesteamengineorothei motor, the gears b, f, are caused toproduce a revolution of the fan in the opposite di-l rection indicated by `the arrow it, in Fig.` Il. y The resistance of the `atmosphere tothelrevolution of the vanes M, ofthe fan tends to t-urn the crank arm fE, in the directionof "l the arrow g, (Figxl) that is to say the op-` posite direction to that in which the spring 7 J, or weight tends to turn the said arm, such i resistance acts through the said arm E, on i the sector H, and hence to closethe valve;` and this tendency becomes greater or as* the velocity of the fan isincreased or `di` minished by an increased or diminished-`` A speed of the engine. By thus separating the Y valve stem` from the main spindle ofthe. governor attachingthe crank arm which carries the fan to a loosel sleeve and gearing the governor and valvestem by teeth on the said crank arm anda sector onthe s1'.em,`thef` governor and valve are combined in a more compact form than when` the crankis `ati y, tached directly tothe valvestem or spindle, i and the valve is relieved by the injurious` `action to which it is subjected` by the rock` e ing action of the weight of thegovernor `on its stem or spindle, and besides thispro-` vision is made for giving theivalve` any!` amount of movement a" given `move- Combining the main spindle C, of the fan governor Withthe stern or spindle B, of the valve by means of a toothedarc formed upon or attached tothe extremity of the crank arni Which carriesv the fan, and a toothed sector upon the Valve stein, the said crank arm being attached to a sleeve fitted to the spindle'C, and the Whole being otherwise arranged substantially as herein described.

Y ISAAC Y. CHUBBUCK.

Witnesses:

STILLMAN E. CHUBBUOK, I-IENRY F. THAYER. 

